Collapsible paste tube



Aug. 7, 1934. 1.. CHlCOlNE COLLAPSIBLE PASTE TUBE Original Filed Jan. 7, 1955 Inventor flllomey Patented Aug. 7, 1934 1,969,395 COLLAPSIBLE PASTE TUBE Louis Chicoine, Wilton,

half to Edward McD Application January 7,

Maine, assignor of oneonald, Wilton, Maine 1933, Serial No. 850,709

Renewed January 15, 193% 2 Claims.

This invention relates to an improved collapsible tube such as is used extensively for containing and dispensing creams and pastes.

More specifically stated, the invention has to do with the style and type of tube employed as a container for facial creams, tooth paste, shaving 'cream and similar chemical, medical and pharmaceutical preparations.

The primary purpose of the invention is to provide a tube of this class equipped with an automatically closable valve functioning as a practicable substitute for the usual detachable screw cap now employed in the manufacture of tubes of this classification.

In carrying the inventive conception into practice I have discovered a simple and economical valved closure which is automatically pressed to closing position by a coiled spring, and forced to open discharge position by the pressure of the contents exerted against the closure when the tube is rolled and forcibly squeezed in a well known manner.

Other features and advantages of the invention will become more readily apparent from the following description and drawing.

In the drawing:

Figure 1 is a sectional view of the structure designed in accordance with the principle of the present invention showing the closing valve in its closed state. 1

Figure 2 is a view similar to Figure 1 showing the valve open to discharge the contents of the tube.

Figure 3 is a detail perspective view of the valve per se.

In the drawing the collapsible tube is generally denoted by the numeral 4 and is of conventional construction and provided with a special conical end 5 having a central smooth bore discharge neck 6. It is in this neck that the closing valve or closure 7 is slidably mounted. The closure comprises a closing cap '7' provided with a gasket or washer "8 to provide a fluid-tight joint between the marginal edge of the cap and the adjacent end of the neck 6. This cap is provided with an elongated cylindrical sleeve 9 which extends in through the sleeve and into the interior of the tube in the manner illustrated in Figure 1.

The sleeve is provided with a suitable dischargeorifice or port 10 through which the contents of the tube (not shown) are forcibly ejected. At its inner end the sleeve is open and provided with diametrically opposite V-shaped notches 11. At the same end the sleeve carries a pair of diametrically opposite outstanding flanges 12 against which the coiled spring 13 bears. The coiled spring surrounds the inner end portion of the sleeve and bears at its opposite end against the inner end of said neck 6. The spring is of the normally expansible type and therefore serves to exert inward pressure on the flanges 12 to seat the cap 7' and close theport 10 by drawing it into the neck. This is shown in Figure 1. Manifestly; however, by squeezing the collapsible tube 4 in the usual way, after it is filled, the paste-like con- 55 tents thereof serve to flll the sleeve and exert pressure against the cap 7' to overcome the tension of the spring 13 and force the sleeve outwardly to the position shown in Figure 2at which time a limited quantity of the contents is discharged through the port 10. ,When pressure on the tube is released the spring serves to automatically close the cap.

It is thought that the description taken in connection with the drawing will enable a clear understanding of the invention tobe had. Therefore, a. more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired. 1 I

1. In a structure of the class described, a 001- lapsible tube provided with a smooth bore discharge neck, a closing cap for said neck, a sleeve of cylindrical form carried by said cap and extending slidably through said neck into the interior of the tube, that portion of the sleeve adjacent the cap being formed with an orifice, the inner end portion of the sleeve being formed with diametrically opposite notches and diametrically opposed stop flanges, and a coiled spring surrounding the inner end portion of. said sleeve and bearing at its inner end against said flanges and at its .outer end against the inner end of said neck.

2. In combination, a discharge neck for a collapsible tube, a closing cap for said neck, a sleeve carried by said cap and extending slidably through I said neck, that portion of the sleeve adjacent the cap being formed with an orifice, the end portion of the sleeve remote from the cap being formed with diametrically opposed notches, and 5 means associated with said sleeve for normally holding the cap in abutment with the adjacent end of the neck.

LOUIS CHICOINE. 

